◆ MidOpt Dual Bandpass and Triple Bandpass Filters are most commonly used for security and surveillance, intelligent traffic solutions and Normalized Difference Vegetation Index (NDVI) imaging.
◆ DB395/870 Dual Bandpass Filter passes UV-Violet and infrared wavelengths, effectively blocking all green and red light. These filters have traditionally found use in NDVI-type imaging applications.
◆ When using a single camera modified for aerial agricultural surveillance, incorporation of these so-called “Superblue” or “Infrablue” filters allows reflected near-infrared light (745-970nm) to be captured in the camera sensor’s red channel and reflected violet light (375-425nm) to be captured in the sensor’s blue channel (the green channel is not used).
◆ Even when using an inexpensive consumer camera (that has first had its IR blocking filter removed), this easy separation then makes it possible to post-process the red and blue channels for NDVI by performing the calculation: NDVI = (red – blue) / (red + blue).
|Part No||Description||Useful Range|
|➡DB395/870||Dual Bandpass Absorptive Visible + NIR||375-425nm,45-970nm|
|➡DB475/850||Dual Bandpass Blue + 850nm NIR||460-490nm,830-870nm|
|➡DB550/850||Dual Bandpass Green + 850nm NIR||535-565nm,830-870nm|
|➡DB660/850||Dual Bandpass Red + 850nm NIR||645-675nm,830-870nm|
|➡DB735||Dual Bandpass Filter Visible + 735nm NIR||405-645nm,725-755nm|
|➡DB850||Dual Bandpass Filter Visible + 850nm NIR||405-645nm,835-875nm|
|➡DB940||Dual Bandpass Filter Visible + 940nm NIR||405-650nm,925-965nm|
MidOpt filters have the unique ability to control the quality and quantity of light, block all unwanted ambient light, pass only the output of light necessary for inspection and significantly increase contrast and resolution. This results in improved system accuracy, long-term repeatability and unmatched stability. Using affordable MidOpt optical...